Multiple Sclerosis muscle weakness or MS muscle weakness is different from regular muscle weakness, as it is caused by damage to the nerves, rather than under or over-use of muscles through physical exertion. MS muscle weakness happens because the central nervous system is damaged and messages don’t get through to the limbs and muscles in the body. This lack of messages from the central nervous system means that limbs that are already used less frequently, are used even less and will become weaker. Although the principal cause of Multiple Sclerosis muscle weakness is problems with nerves, not exercising the limbs that are affected will only make the problem worse. Don’t try and tackle MS muscle weakness with aerobic exercise, as this will only increase your chances of developing severe fatigue. Exercise that strengthens and tones the affected muscles will be much more effective and will be less likely to tire …